The PURPOSE of the s/l sets is to see if ALL of them ring when the craziness starts or if only line one rings on both the 7100 and the s/l set. It is a TEST.
The PURPOSE of shorting out line one is a test to see if that one line causes the problem.
The PURPOSE of putting the lines in reverse order is to see if it is the FIRST line position on the 7100 that is causing trouble.
If you have a radio station coming in on dial tones, then GROUND every wire that is not being used for dial tone on the protector. Ground any unused pairs on the cable from the protector to the KSU.
Radio stations broadcast from towers and Mike Sandman has chokes you can use if GROUNDING all spare pairs does not work adequately.
Get a sleeping bag and don't come home until you have done all the tests for several hours.
